GB1428708A - Ballast apparatus for operating a gaseous discharge device - Google Patents

Ballast apparatus for operating a gaseous discharge device

Info

Publication number
GB1428708A
GB1428708A GB3543473A GB3543473A GB1428708A GB 1428708 A GB1428708 A GB 1428708A GB 3543473 A GB3543473 A GB 3543473A GB 3543473 A GB3543473 A GB 3543473A GB 1428708 A GB1428708 A GB 1428708A
Authority
GB
United Kingdom
Prior art keywords
shunt
magnetic
july
transformer
slots
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3543473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1428708A publication Critical patent/GB1428708A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/391—Controlling the intensity of light continuously using saturable magnetic devices

Abstract

1428708 Transformers GENERAL ELECTRIC CO 25 July 1973 [28 July 1972] 35434/73 Heading HIT [Also in Division H2] A transformer 1 for a discharge lamp ballast circuit comprises primary windings 3a, 3b and secondary windings 5a, 5b wound on the legs of a magnetic core 2 formed of a stack of magnetic steel laminations. Slots 9, 10 reduce the cross-section of the secondary core portion to produce localized saturation and a magnetic shunt 11 provides leakage reactance in the transformer. The shunt 11 is spaced from the core legs by gaps 13, 14 which may be air gaps or spaces containing insulating material such as kraft paper. Auxiliary induction coils may be used instead of the shunt 11 and the slots 9, 10 to provide the necessary leakage reactance and secondary magnetizing reactance.
GB3543473A 1972-07-28 1973-07-25 Ballast apparatus for operating a gaseous discharge device Expired GB1428708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27594772A 1972-07-28 1972-07-28

Publications (1)

Publication Number Publication Date
GB1428708A true GB1428708A (en) 1976-03-17

Family

ID=23054476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3543473A Expired GB1428708A (en) 1972-07-28 1973-07-25 Ballast apparatus for operating a gaseous discharge device

Country Status (4)

Country Link
US (1) US3772565A (en)
AU (1) AU459680B2 (en)
ES (1) ES417279A1 (en)
GB (1) GB1428708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140229A (en) * 1983-05-17 1984-11-21 Emi Plc Thorn Discharge lamp start and supply circuit

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873910A (en) * 1973-10-18 1975-03-25 Gen Electric Ballast control device
US4016452A (en) * 1975-01-14 1977-04-05 General Electric Company Lamp ballast circuit
US4591763A (en) * 1983-07-14 1986-05-27 Wanasz Michael J Electric generator system for portable floodlighting equipment
US5406175A (en) * 1993-10-26 1995-04-11 General Electric Company Lead ballast circuit with power regulation for a gas discharge lamp
DE19530746A1 (en) * 1995-08-22 1997-02-27 Bosch Gmbh Robert Circuit arrangement for operating a high-pressure gas discharge lamp with alternating current
US6225757B1 (en) 2000-05-19 2001-05-01 Magnetek Corp. Combination MH/HPS ballast
JP2008224870A (en) * 2007-03-09 2008-09-25 Sony Corp Projector and its control method
JP5136824B2 (en) * 2007-03-09 2013-02-06 ソニー株式会社 Projector and control method thereof
JP4433320B2 (en) * 2007-03-09 2010-03-17 ソニー株式会社 Projector and control method thereof
US8016433B2 (en) * 2007-03-09 2011-09-13 Sony Corporation Projector and control method thereof
JP5109527B2 (en) * 2007-08-03 2012-12-26 ソニー株式会社 Image forming apparatus, control method therefor, and program
US7847664B2 (en) * 2009-05-06 2010-12-07 Verde Power Supply, Inc. Electromagnetic apparatus using shared flux in a multi-load parallel magnetic circuit and method of operation
US9425644B1 (en) 2015-06-03 2016-08-23 Thor Charger Company Method and apparatus for charging an electrically chargeable device utilizing resonating magnetic oscillations in the apparatus
WO2019040978A1 (en) 2017-09-01 2019-03-07 Trestoto Pty Limited A lighting control circuit, lighting installation and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578395A (en) * 1947-09-25 1951-12-11 Gen Electric Electrical ballast
US2470460A (en) * 1948-06-05 1949-05-17 Hanovia Chemical & Mfg Co Wattage controlling system
US3061759A (en) * 1951-06-27 1962-10-30 Advance Transformer Co Circuit for starting and operating discharge tubes
US2930998A (en) * 1956-02-09 1960-03-29 Ward Leonard Electric Co Fluorescent lamp dimming ballast
US3059143A (en) * 1960-05-09 1962-10-16 Basic Products Corp Ballast for discharge devices
US3684921A (en) * 1970-08-31 1972-08-15 Luis F De Leon Illuminating apparatus and ballast circuit
US3679931A (en) * 1970-09-16 1972-07-25 Gen Electric Apparatus for operating electric discharge lamps and auxiliary lighting lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140229A (en) * 1983-05-17 1984-11-21 Emi Plc Thorn Discharge lamp start and supply circuit

Also Published As

Publication number Publication date
US3772565A (en) 1973-11-13
AU5743773A (en) 1975-01-09
ES417279A1 (en) 1976-03-16
AU459680B2 (en) 1975-04-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee